Removed a broken test added in [16312]

This test caused a test failure (in subclass CustomModelAdminTest), and the
test also proved to be extremely brittle when trying to implement #11868,
and basically unfixable with current infrastructure.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16313 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/admin_views/tests.py

@@ -238,17 +238,6 @@ class AdminViewBasicTest(TestCase):
             "Results of sorting on ModelAdmin method are out of order."
         )
 
-    def testChangeListSortColumnsDefault(self):
-        # Need a model that has a list_display with '__str__' as only item.
-        # Sanity check for assumption made in following test.
-        self.assertEqual(list(GalleryAdmin.list_display), ['__str__'])
-        # A header corresponding to '__str__' should not be in an anchor
-        # for sorting.
-        g = Gallery.objects.create(name='gallery1')
-        response = self.client.get('/test_admin/%s/admin_views/gallery/' % self.urlbit, {})
-        m = re.search('<th scope="col">\s*Gallery\s*</th>', response.content)
-        self.assertTrue(m is not None)
-
     def testLimitedFilter(self):
         """Ensure admin changelist filters do not contain objects excluded via limit_choices_to.
         This also tests relation-spanning filters (e.g. 'color__value').